GDS Shearbase System GDS Electro-Mechanical Dynamic Cyclic Simple Shear Variable Direction Dynamic Cyclic Simple Shear Multi Direction Dynamic Cyclic Simple Shear Interface Shear Tester Ring Shear Apparatus Dynamic Back Pressure Shearbox GDS Back Pressured Shear Box Back Pressure Shearbox - High Pressure GDS Large Automated Direct Shear System (300mm) Shearbox Upgrade